from flask import current_app, jsonify
from flask import render_template
from flask import request
from flask import session

from info import constants
from info import redis_store
from info.models import User, News, Category
from info.utils.response_code import RET
from  . import index_blu


@index_blu.route('/news_list')
def news_list():
    """
    获取首页新闻数据
    :return:
    """
    #1.获取参数'
    cid = request.args.get("cid",'1')
    page = request.args.get("page",'1')
    per_page = request.args.get("per_page","10")
    #2.校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page= int(per_page)
    except Exception as e :
        current_app.logger.error(e)
        return jsonify(errno = RET.PARAMERR,errmsg = "参数错误")
    filters = [News.status ==0 ]
    if cid !=1: #查询的不是最新的数据
        #需要添加条件
        filters.append(News.category_id == cid)
    #3.查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,per_page,False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno = RET.DBERR,errmsg = "数据查询错误")
    #取到当前页的数据
    news_model_list = paginate.items#模型对象列表
    total_page = paginate.pages
    current_page = paginate.page
    #将模型对象列表围成字典列表
    news_dict_li = []
    for news in news_model_list:
        news_dict_li.append(news.to_basic_dict())
    data = {
        "total_page":total_page,
        "current_page":current_page,
        "news_dict_li":news_dict_li
    }
    return jsonify(errno = RET.OK,errmsg = "OK",data = data)
@index_blu.route('/')
def index():
    """
    显示首页
    1.如果用户已经登录，将当前登录用户的数据传到模板中，供模板显示

    #显示用户是否登录的逻辑
    #取到用户id
    :return:
    """
    user_id = session.get("user_id",None)
    user = None
    if user_id:
        #尝试查询用户的模型
        try:
            user = User.query.get(user_id)
        except Exception as e:
            current_app.logger.error(e)
    #右侧的新闻排行的逻辑
    news_list = []
    try:
        news_list =  News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e :
        current_app.looger.error(e)
    #定义一个空的字典列表，里面装的就是字典
    news_dict_li= []
    #遍历对象列表,将对象的字典添加到字典列表中
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())
    #查询分类数据，通过模板的形式渲染出来
    categories = Category.query.all()
    category_li = []
    for category in categories:
        category_li.append(category.to_dict())


    data = {
        "user":user.to_dict()if user else  None,
        "news_dict_li":news_dict_li,
        "category_li":category_li
    }

    return render_template('news/index.html',data=data )

#在打打开网页的时候，浏览器会默认去请求路径+favicon.ico作网站标签的小图标
#send_static_file 是flask去查找指定的静态文件所调用的方法
@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')